Affiliated Managers Group, Inc.
DE ˙ DB ˙ US0082521081
270,00 € ↑14,00 (5,47%)
2026-06-04
AKTIENPREIS
SecurityDE:AFS / Affiliated Managers Group, Inc.
InstitutionSummit Trail Advisors, Llc
Latest Disclosed Ownership8,608 shares
Latest Disclosed Value $ 2,381,834
Summit Trail Advisors, Llc reports 38.44% increase in ownership of AFS / Affiliated Managers Group, Inc.

On May 12, 2026 - Summit Trail Advisors, Llc filed a 13F-HR form disclosing ownership of 8,608 shares of Affiliated Managers Group, Inc. (DE:AFS) valued at $2,031,488 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 6,218 shares of Affiliated Managers Group, Inc.. This represents a change in shares of 38.44% during the quarter. The current value of the position is $2,324,160 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

Upgrade to unlock premium data and export to Excel .

Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-12 2026-03-31 13F AFFILIATED MANAGERS GROUP COM 008252108 8,608 2,390 38.44 2,382 32.87 0.0341
2026-02-17 2025-12-31 13F AFFILIATED MANAGERS GROUP IN COM 008252108 6,218 -621 -9.08 1,793 9.94 0.0310
2025-11-14 2025-09-30 13F AFFILIATED MANAGERS GROUP IN COM 008252108 6,839 4,044 144.69 1,631 196.90 0.0225
2025-08-14 2025-06-30 13F AFFILIATED MANAGERS GROUP IN COM 008252108 2,795 2,795 550 0.0094
2025-01-29 2024-12-31 13F AFFILIATED MANAGERS GROUP IN COM 008252108 0 -1,573 -100.00 0 -100.00
2024-11-12 2024-09-30 13F AFFILIATED MANAGERS GROUP IN COM 008252108 1,573 1,573 280 0.0069
2018-08-10 2018-06-30 13F AFFILIATED MANAGERS GROUP COM EQUITY 008252108 0 -40,726 -100.00 0 -100.00
2018-05-21 2018-03-31 13F AFFILIATED MANAGERS GROUP COM EQUITY 008252108 40,726 40,490 17,156.78 41 -16.33 0.0064
2018-02-14 2017-12-31 13F AFFILIATED MANAGERS GROUP INC COM EQUITY 008252108 236 236 49 0.0062
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.